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Many of the graphical reports allow you to customize the information on the display. Variable substitutions are used to substitute date for a particular symbol. There are two styles of variables. The difference between the two styles is how empty data is handled.

The first style of variables are preceded by a $. The line is printed and the variable is printed as found in your family tree.

Example: 'Born: $b' will show as 'Born: 2001' if a birth date is found, and 'Born: ', if no date is found

The second style of variables are preceded by a %. If the variable evaluates to an empty string, the entire line that contains the variable is removed from the output!

Example: '$n - Born: %b' will show as 'John Doe - Born: 2001' if a birth date is found, whereas the line will not be present if no date is found